This would be … significant, yes?

Update: The announcement’s supposed to come at a press conference scheduled for 1 p.m. You can watch live over the

web here.

Update: The Daily Mail has photos.

NASA researchers have documented the formation of new craters on the plant’s surface and found bright, light-coloured deposits in gullies that were not present in previous photos.

They concluded the deposits – possibly mud, salt or frost – were left there when water recently cascaded through the channels.

Update: Omri Ceren is liveblogging the presser.

Update: The images are intriguing.